The quake, which the U.S. Geological survey estimated might have been closer to 8.2-magnitude, could be felt in Moscow, 4,000 miles away and two buildings in the city were evacuated, but there were no reports of injuries or damage at any location.
A tsunami alert was issued and then canceled, officials said.
The epicenter of the earthquake was 244 miles west-northwest of Petropavlovsk-Kamchatskiy, the closest significant center of population, the BBC reported.
The quake was centered at a depth of 385 miles, RIA Novosti reported.
The last time earthquake tremors were felt in Moscow was in 1977, the report said.